











S275JR Carbon Steel Round Bar
S275JR Carbon Steel Round Bar is a widely utilized material in various industries, known for their excellent combination of strength, flexibility, and cost-effectiveness. These round bars are made from S275JR grade steel, a low-carbon steel that offers good weldability and machinability, making it ideal for structural and engineering applications. The versatility of S275JR Round Bars allows them to be used in construction, manufacturing, automotive, and other industrial sectors where reliable performance and structural integrity are crucial.
Readily weldable low-carbon manganese steel with good impact resistance (also in sub-zero temperatures).
This material is commonly supplied in the untreated or normalized condition and is available in several
variations (denoted by additional letters and/or digits) which offer slight modifications of chemical composition
and mechanical properties.
Machinability of this material is similar to that of mild steel.
Product Description
| Product | S275JR Carbon Steel Round Bar |
| OD | 10mm-300mm |
| Wall Thickness | 10mm-300mm |
| Length | 1m-12m, or as the customer’s requirements. |
| Packing | Widely used in the construction industry, Mechanical Engineering, Aviation Equipment, and Rail Transit Equipment |
| Sample | Free samples and customization available |
| Technique | Hot Rolled Cold Rolled |
| Package | Waterproof packaging + wooden box, or according to customer needs |
| Test | Chemical Component Analysis, Mechanical Properties, Technical Properties, Exterior Size Inspection, Hydraulic Testing, X-ray Test |
| Application | Boiler&economizer, Energy, Petrochemical, Mining, Food, Paper, Gas, And Fluid Industry |
Chemical Composition of S275JR Carbon Steel Round Bar
| C for nominal thickness in mm | Mn | P | S | N | Cu | ||
| ≤ 16 | ˃16 ≤ 40 | ˃ 40 | |||||
| ≤ 0.21 | ≤ 0.21 | ≤ 0.22 | ≤ 1.50 | ≤ 0.035 | ≤ 0.035 | ≤ 0.012 | ≤ 0.55 |
S275JR Carbon Steel Round Bar Mechanical Properties
| Nominal thickness, mm | Minimum yield strength, MPa | Strength limit, MPa |
| <3 | 275 | 430-580 |
| ≥3 ≤ 16 | 275 | 410-560 |
| > 16 ≤ 40 | 265 | 410-560 |
| > 40 ≤ 63 | 255 | 410-560 |
| > 63 ≤ 80 | 245 | 410-560 |
| > 80 ≤ 100 | 235 | 410-560 |
| > 100 ≤ 150 | 225 | 400-540 |
| > 150 ≤ 200 | 215 | 380-540 |
| > 200 ≤ 250 | 205 | 380-540 |
| > 250 ≤ 400 | 195 | 380-540 |
Applications of S275JR Round Bar
Construction and Infrastructure
- Structural Frameworks: S275JR Round Bars are commonly used in the construction of building frameworks, providing essential support and stability to structures.
- Bridges and Walkways: These round bars are used in the construction of bridges and walkways, where strength and durability are crucial.
- Support Beams: Often employed as support beams in buildings and infrastructure projects, offering reliable load-bearing capacity.
Manufacturing
- Machinery Components: S275JR Round Bars are utilized in the production of various machinery components, thanks to their strength and machinability.
- Fabrication of Tools: Ideal for fabricating tools and dies that require precision and durability.
Automotive Industry
- Vehicle Frames: Used in the manufacturing of vehicle frames and chassis, providing the necessary strength and flexibility.
- Components: Employed in the production of various automotive components that require robust and reliable materials.
Industrial Applications
- Equipment Manufacturing: Used in the manufacturing of industrial equipment and machinery, where strength and resilience are essential.
- Platforms and Flooring: Applied in creating platforms, flooring, and other structural elements in industrial settings.
Renewable Energy
- Wind Turbine Structures: S275JR Round Bars are used in the construction of wind turbine towers and other renewable energy structures, where both strength and flexibility are required.
General Fabrication
- Brackets and Supports: Commonly used to fabricate brackets, supports, and other general-purpose structural components.
- Custom Fabrication: Ideal for custom fabrication projects that require specific dimensions and reliable material properties.
Application
Agricultural Modernization
Construction Engineering
Environmental Protection Engineering
Food Processing Industry
Intelligent Home Appliances
Medical and Health Field
New Energy Infrastructure









